FILE - In this May 4, 2012 file photo, Floyd Mayweather Jr. 

FILE - In this May 4, 2012 file photo, Floyd Mayweather Jr. flexes during his weigh-in for his super welterweight title fight against Miguel Cotto in Las Vegas. Mayweather Jr. finally confirms he'll fight Robert Guerrero on May 4, but the biggest star in boxing says he'll continue his career on a different network. After several years on HBO, Mayweather has signed a multifight deal with Showtime. (AP Photo/Julie Jacobson, File)
Associated Press
FILE - In this May 4, 2012 file photo, Floyd Mayweather Jr. flexes during his weigh-in for his super welterweight title fight against Miguel Cotto in Las Vegas. Mayweather Jr. finally confirms he'll fight Robert Guerrero on May 4, but the biggest star in boxing says he'll continue his career on a different network. After several years on HBO, Mayweather has signed a multifight deal with Showtime. (AP Photo/Julie Jacobson, File)
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